Anyone got a version of APP_MapKeyToUsage for French and German keyboards they can share?

I need to support UK, US, French and German keyboards in my application. US/UK are working fine. German looks like a pain with AltGR needed for simple characters like @[]{} (How do Germans program in C without going mad?). If anyone has some code and key mappings they can share to save me re-inventing the wheel it would be appreciated